Also, try to have some transparency in your theme as the solid white covers a lot of the Team Builder. You might wanna use better images too. Overall, you have a great idea but try to be more creative with it all around.

Often a way to help with images is to choose super large images. So when image searching in something like google only filter in large images. This means the images will either be to size, or they will not pixellate and lose definition when you enlarge them (slightly). This makes for a crisper, more professional feel to your thememaking.

As a clue on trying to phase out a little of the white, try using some of the green you have through the theme?